Difference between revisions of "Cocoa Internals/Extensions"
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LCLObjectExtensions methods are: | LCLObjectExtensions methods are: | ||
{| class="wikitable" style="width:100%" | {| class="wikitable" style="width:100%" | ||
| − | !Method | + | !rowspan="2"|Method |
| − | !Description | + | !rowspan="2"|Description |
| − | ! | + | !colspan="2"|Default behavior |
| + | |- | ||
| + | !LCLObjectExtension | ||
| + | !LCLViewExtensions | ||
|- | |- | ||
|lclIsEnabled | |lclIsEnabled | ||
|Returns true/false if control is enabled | |Returns true/false if control is enabled | ||
|false | |false | ||
| + | | | ||
|- | |- | ||
|lclSetEnable | |lclSetEnable | ||
|Enables or disables the control | |Enables or disables the control | ||
|does nothing | |does nothing | ||
| + | | | ||
|- | |- | ||
|lclisVisible | |lclisVisible | ||
|Returns true/false if control is visible | |Returns true/false if control is visible | ||
|false | |false | ||
| + | |[https://developer.apple.com/documentation/appkit/nsview/1483369-hidden not hidden] | ||
|- | |- | ||
|lclSetVisible | |lclSetVisible | ||
|shows or hides a control | |shows or hides a control | ||
|does nothing | |does nothing | ||
| + | |setHidden() (where is the method in the documentation? deprecated?) | ||
|} | |} | ||
Revision as of 19:26, 23 December 2017
Extensions are used to add additional lcl-friendly methods to all Cocoa classes. The default implementation of each method should:
- either indicate that a class is not a LCL-specific class (it's Cocoa native) thus should be handled with care
- provide a basic functionality for LCL types (for example setting a control bounds using TRect type. Where cocoa is using float-point NSRect)
Extensions
LCLObjectExtension
The extensions adds additional methods to NSObject class of cocoa. (This is TObject counterpart, where (almost) all classes in Cocoa inherit from).
A lot of the methods below are control specific methods, thus it might be a good idea to elevate the extension from NSObject to NSView or NSControl. However, this might impact other control-like objects (i.w. NSWindow?)
LCLObjectExtensions methods are:
| Method | Description | Default behavior | |
|---|---|---|---|
| LCLObjectExtension | LCLViewExtensions | ||
| lclIsEnabled | Returns true/false if control is enabled | false | |
| lclSetEnable | Enables or disables the control | does nothing | |
| lclisVisible | Returns true/false if control is visible | false | not hidden |
| lclSetVisible | shows or hides a control | does nothing | setHidden() (where is the method in the documentation? deprecated?) |
Convention
- All lcl extension methods should start with "lcl" to distinguish them Cocoa native methods.
